units.json
Unit conversion reference data • CC BY 4.0 License
{
"meta": {
"title": "Unit Conversion Reference Data",
"description": "Comprehensive unit conversions for length, temperature, area, volume, speed, pressure, electrical units, and more",
"source": "Able-Hearts.org",
"license": "CC BY 4.0",
"url": "https://able-hearts.org/reference/units",
"version": "1.0.0",
"lastUpdated": "2025-11-12"
},
"categories": {
"length": {
"name": "Length / Distance",
"symbol": "📐",
"units": {
"mm": {
"name": "Millimeter",
"tts": "millimeter or millimeters",
"toMeters": 0.001,
"commonUse": "Small measurements, rain",
"conversions": {
"in": 0.0394
}
},
"cm": {
"name": "Centimeter",
"tts": "centimeter or centimeters",
"toMeters": 0.01,
"commonUse": "Everyday objects, height",
"conversions": {
"in": 0.394
}
},
"m": {
"name": "Meter",
"tts": "meter or meters",
"toMeters": 1,
"commonUse": "Standard SI unit, room dimensions",
"conversions": {
"ft": 3.281,
"yd": 1.094
}
},
"km": {
"name": "Kilometer",
"tts": "kilometer or kilometers",
"toMeters": 1000,
"commonUse": "Distance between cities, roads",
"conversions": {
"mi": 0.621
}
},
"in": {
"name": "Inch",
"tts": "inch or inches",
"toMeters": 0.0254,
"commonUse": "Screen size, imperial",
"conversions": {
"cm": 2.54
}
},
"ft": {
"name": "Foot",
"tts": "foot or feet",
"toMeters": 0.3048,
"commonUse": "Height, building dimensions",
"conversions": {
"in": 12,
"cm": 30.48
}
},
"yd": {
"name": "Yard",
"tts": "yard or yards",
"toMeters": 0.9144,
"commonUse": "Football field, fabric",
"conversions": {
"ft": 3,
"m": 0.914
}
},
"mi": {
"name": "Mile",
"tts": "mile or miles",
"toMeters": 1609.34,
"commonUse": "Long distances, roads (US)",
"conversions": {
"ft": 5280,
"km": 1.609
}
}
}
},
"temperature": {
"name": "Temperature",
"symbol": "🌡️",
"units": {
"C": {
"name": "Celsius",
"symbol": "°C",
"tts": "degrees Celsius or Celsius",
"waterFreeze": 0,
"waterBoil": 100,
"roomTemp": "20-25",
"bodyTemp": 37,
"toKelvin": "K = C + 273.15",
"toFahrenheit": "F = (C × 9/5) + 32"
},
"F": {
"name": "Fahrenheit",
"symbol": "°F",
"tts": "degrees Fahrenheit or Fahrenheit",
"waterFreeze": 32,
"waterBoil": 212,
"roomTemp": "68-77",
"bodyTemp": 98.6,
"toCelsius": "C = (F - 32) × 5/9",
"toKelvin": "K = (F - 32) × 5/9 + 273.15"
},
"K": {
"name": "Kelvin",
"symbol": "K",
"tts": "Kelvin",
"absoluteZero": 0,
"waterFreeze": 273.15,
"waterBoil": 373.15,
"roomTemp": "293-298",
"toCelsius": "C = K - 273.15",
"toFahrenheit": "F = (K - 273.15) × 9/5 + 32"
}
}
},
"electrical": {
"name": "Electrical Units",
"symbol": "⚡",
"units": {
"V": {
"name": "Volt",
"tts": "volt or volts",
"description": "Electrical potential difference",
"examples": {
"AABattery": "1.5 V",
"carBattery": "12 V",
"USHousehold": "110-120 V",
"EUHousehold": "220-240 V",
"transmission": "500 kV"
}
},
"A": {
"name": "Ampere",
"tts": "ampere or amp or amps",
"description": "Flow of electrical charge",
"examples": {
"USBCharger": "~2 A",
"householdCircuit": "15-20 A",
"EVCharger": "32-80 A",
"lightning": "~30,000 A"
}
},
"W": {
"name": "Watt",
"tts": "watt or watts",
"description": "Rate of energy transfer (Power)",
"formula": "W = V × A",
"examples": {
"LEDBulb": "8-15 W",
"laptop": "45-100 W",
"microwave": "1000-1200 W",
"electricCar": "150-300 kW",
"powerPlant": "500-1000 MW"
}
},
"kWh": {
"name": "Kilowatt-hour",
"tts": "kilowatt-hour or kilowatt-hours",
"description": "Energy unit for electricity bills",
"formula": "1 kWh = 1000 W for 1 hour = 3.6 MJ",
"examples": {
"smartphone": "10-20 Wh",
"laptop": "50-100 Wh",
"electricCar": "50-100 kWh",
"homePerMonth": "800-1000 kWh"
}
},
"Ω": {
"name": "Ohm",
"symbol": "Ω",
"tts": "ohm or ohms",
"description": "Electrical resistance"
},
"Hz": {
"name": "Hertz",
"tts": "hertz",
"description": "Frequency (cycles per second)",
"examples": {
"USGrid": "60 Hz",
"EUGrid": "50 Hz",
"WiFi24": "2.4 GHz",
"WiFi5": "5 GHz"
}
}
}
},
"area": {
"name": "Area",
"symbol": "📐",
"units": {
"m²": {
"name": "Square meter",
"tts": "square meter or square meters",
"toSqMeters": 1,
"commonUse": "Room size",
"conversions": {
"ft²": 10.764
}
},
"cm²": {
"name": "Square centimeter",
"tts": "square centimeter or square centimeters",
"toSqMeters": 0.0001,
"commonUse": "Small objects"
},
"km²": {
"name": "Square kilometer",
"tts": "square kilometer or square kilometers",
"toSqMeters": 1000000,
"commonUse": "Land area, cities",
"conversions": {
"mi²": 0.386
}
},
"in²": {
"name": "Square inch",
"tts": "square inch or square inches",
"toSqMeters": 0.00064516,
"commonUse": "Screen size"
},
"ft²": {
"name": "Square foot",
"tts": "square foot or square feet",
"toSqMeters": 0.092903,
"commonUse": "Room size (US)"
}
}
},
"volume": {
"name": "Volume",
"symbol": "🧊",
"units": {
"m³": {
"name": "Cubic meter",
"tts": "cubic meter or cubic meters",
"toCubicMeters": 1,
"commonUse": "Room volume"
},
"cm³": {
"name": "Cubic centimeter",
"tts": "cubic centimeter or cubic centimeters",
"toCubicMeters": 0.000001,
"commonUse": "Small objects",
"conversions": {
"mL": 1
}
},
"L": {
"name": "Liter",
"tts": "liter or liters",
"toCubicMeters": 0.001,
"commonUse": "Liquids",
"conversions": {
"gal": 0.264
}
},
"mL": {
"name": "Milliliter",
"tts": "milliliter or milliliters",
"toCubicMeters": 0.000001,
"commonUse": "Small liquid amounts",
"conversions": {
"cm³": 1
}
},
"gal": {
"name": "Gallon",
"tts": "gallon or gallons",
"toCubicMeters": 0.00378541,
"commonUse": "Fuel, milk (US)",
"conversions": {
"L": 3.785
}
}
}
},
"speed": {
"name": "Speed",
"symbol": "🚀",
"units": {
"km/h": {
"name": "Kilometers per hour",
"tts": "kilometers per hour",
"toMetersPerSecond": 0.277778,
"commonUse": "Vehicle speed (metric)"
},
"m/s": {
"name": "Meters per second",
"tts": "meters per second",
"toMetersPerSecond": 1,
"commonUse": "Physics, science"
},
"mph": {
"name": "Miles per hour",
"tts": "miles per hour",
"toMetersPerSecond": 0.44704,
"commonUse": "Vehicle speed (US)",
"conversions": {
"km/h": 1.609
}
}
}
},
"pressure": {
"name": "Pressure",
"symbol": "🌊",
"units": {
"kPa": {
"name": "Kilopascal",
"tts": "kilopascal or kilopascals",
"toPascals": 1000,
"commonUse": "Tire pressure, weather",
"seaLevel": "101 kPa"
},
"atm": {
"name": "Atmosphere",
"tts": "atmosphere or atmospheres",
"toPascals": 101325,
"commonUse": "Older pressure standard",
"seaLevel": "1 atm"
},
"psi": {
"name": "Pounds per square inch",
"tts": "P S I or pounds per square inch",
"toPascals": 6894.76,
"commonUse": "Tire pressure (US)",
"seaLevel": "14.7 psi"
},
"mmHg": {
"name": "Millimeters of mercury",
"tts": "millimeters of mercury",
"toPascals": 133.322,
"commonUse": "Blood pressure, barometers",
"seaLevel": "760 mmHg"
},
"bar": {
"name": "Bar",
"tts": "bar",
"toPascals": 100000,
"commonUse": "Meteorology",
"seaLevel": "~1 bar"
}
}
},
"energy": {
"name": "Energy",
"symbol": "🔋",
"units": {
"J": {
"name": "Joule",
"tts": "joule or joules",
"toJoules": 1,
"description": "SI unit of energy",
"formula": "1 J = 1 N·m"
},
"Wh": {
"name": "Watt-hour",
"tts": "watt-hour or watt-hours",
"toJoules": 3600,
"description": "Energy unit for batteries",
"commonUse": "Phone/laptop batteries"
},
"kWh": {
"name": "Kilowatt-hour",
"tts": "kilowatt-hour or kilowatt-hours",
"toJoules": 3600000,
"description": "Energy unit for electricity",
"commonUse": "Electric bills, EV batteries"
},
"cal": {
"name": "Calorie",
"tts": "calorie or calories",
"toJoules": 4.184,
"description": "Food energy (small calorie)"
},
"Cal": {
"name": "Kilocalorie",
"tts": "kilocalorie or Calorie",
"toJoules": 4184,
"description": "Food energy (large Calorie = 1000 cal)"
}
}
},
"largeNumbers": {
"name": "Large Numbers",
"symbol": "🔢",
"units": {
"thousand": {
"name": "Thousand",
"tts": "thousand",
"value": 1000,
"notation": "1,000 or 10³",
"examples": "1K = 1,000"
},
"million": {
"name": "Million",
"tts": "million",
"value": 1000000,
"notation": "1,000,000 or 10⁶",
"examples": "1M = 1,000,000"
},
"billion": {
"name": "Billion",
"tts": "billion",
"value": 1000000000,
"notation": "1,000,000,000 or 10⁹",
"examples": "1B = 1,000,000,000"
},
"trillion": {
"name": "Trillion",
"tts": "trillion",
"value": 1000000000000,
"notation": "1,000,000,000,000 or 10¹²",
"examples": "1T = 10¹²"
},
"quadrillion": {
"name": "Quadrillion",
"tts": "quadrillion",
"value": 1000000000000000,
"notation": "10¹⁵",
"examples": "1,000 trillion"
},
"quintillion": {
"name": "Quintillion",
"tts": "quintillion",
"value": 1000000000000000000,
"notation": "10¹⁸",
"examples": "1,000 quadrillion"
}
}
},
"dataStorage": {
"name": "Data Storage / Memory",
"symbol": "💾",
"units": {
"B": {
"name": "Byte",
"tts": "byte or bytes",
"toBytes": 1,
"description": "Basic unit of digital information",
"note": "1 byte = 8 bits"
},
"KB": {
"name": "Kilobyte",
"tts": "kilobyte or kilobytes",
"toBytes": 1024,
"description": "Small files, text documents",
"examples": "Email (5-50 KB)"
},
"MB": {
"name": "Megabyte",
"tts": "megabyte or megabytes",
"toBytes": 1048576,
"description": "Photos, songs, small videos",
"examples": "Photo (1-5 MB), Song (3-5 MB)"
},
"GB": {
"name": "Gigabyte",
"tts": "gigabyte or gigabytes",
"toBytes": 1073741824,
"description": "Movies, large files, phone storage",
"examples": "Movie (1-5 GB), Phone storage (64-256 GB)"
},
"TB": {
"name": "Terabyte",
"tts": "terabyte or terabytes",
"toBytes": 1099511627776,
"description": "Hard drives, server storage",
"examples": "External HDD (1-4 TB)"
},
"PB": {
"name": "Petabyte",
"tts": "petabyte or petabytes",
"toBytes": 1125899906842624,
"description": "Data centers, enterprise storage",
"examples": "1 PB = 1,000 TB"
},
"EB": {
"name": "Exabyte",
"tts": "exabyte or exabytes",
"value": "1,152,921,504,606,846,976",
"description": "Global data storage scale",
"examples": "Internet traffic per day"
},
"ZB": {
"name": "Zettabyte",
"tts": "zettabyte or zettabytes",
"notation": "10²¹ bytes",
"description": "Planetary-scale data",
"examples": "All human data combined"
}
}
},
"networkSpeed": {
"name": "Network Speed / Bandwidth",
"symbol": "📡",
"units": {
"bps": {
"name": "Bits per second",
"tts": "bits per second",
"toBitsPerSecond": 1,
"description": "Basic network speed unit"
},
"Kbps": {
"name": "Kilobits per second",
"tts": "kilobits per second",
"toBitsPerSecond": 1000,
"description": "Dial-up, basic connections",
"examples": "Dial-up (56 Kbps)"
},
"Mbps": {
"name": "Megabits per second",
"tts": "megabits per second",
"toBitsPerSecond": 1000000,
"description": "Home internet, WiFi",
"examples": "Home WiFi (50-500 Mbps), 4G (10-50 Mbps)"
},
"Gbps": {
"name": "Gigabits per second",
"tts": "gigabits per second",
"toBitsPerSecond": 1000000000,
"description": "Fiber optic, enterprise networks",
"examples": "Fiber (1 Gbps), 5G (1-10 Gbps)"
},
"Tbps": {
"name": "Terabits per second",
"tts": "terabits per second",
"toBitsPerSecond": 1000000000000,
"description": "Backbone internet infrastructure",
"examples": "Undersea cables"
}
}
},
"scientificConstants": {
"name": "Scientific Constants",
"symbol": "🔬",
"constants": {
"c": {
"name": "Speed of Light",
"symbol": "c",
"tts": "speed of light or C",
"value": "299,792,458 m/s",
"description": "Universal speed limit",
"examples": "Light travels ~300,000 km/s in vacuum"
},
"Na": {
"name": "Avogadro's Constant",
"symbol": "Nₐ",
"tts": "Avogadro's constant or Avogadro's number",
"value": "6.022 × 10²³ mol⁻¹",
"description": "Number of particles in one mole",
"examples": "1 mole of carbon-12 has 6.022×10²³ atoms"
},
"h": {
"name": "Planck's Constant",
"symbol": "h",
"tts": "Planck's constant",
"value": "6.626 × 10⁻³⁴ J·s",
"description": "Quantum of electromagnetic action"
},
"G": {
"name": "Gravitational Constant",
"symbol": "G",
"tts": "gravitational constant or big G",
"value": "6.674 × 10⁻¹¹ N·m²/kg²",
"description": "Universal gravitation constant"
},
"e": {
"name": "Elementary Charge",
"symbol": "e",
"tts": "elementary charge",
"value": "1.602 × 10⁻¹⁹ C",
"description": "Electric charge of a proton"
},
"me": {
"name": "Electron Mass",
"symbol": "mₑ",
"tts": "electron mass",
"value": "9.109 × 10⁻³¹ kg",
"description": "Mass of an electron"
},
"pi": {
"name": "Pi",
"symbol": "π",
"tts": "pi",
"value": "3.14159265359...",
"description": "Ratio of circle's circumference to diameter",
"examples": "Circumference = 2πr"
},
"euler": {
"name": "Euler's Number",
"symbol": "e",
"tts": "Euler's number or E",
"value": "2.71828182846...",
"description": "Base of natural logarithm",
"examples": "Used in exponential growth calculations"
}
}
}
}
}
Usage
License: CC BY 4.0 - Free to use with attribution
Attribution: Source: Able-Hearts.org